Elastix

Description

Elastix is an open source Unified Communications Server software that brings together IP PBX, email, IM, faxing and collaboration functionality. It has a Web interface and includes capabilities such as a Call Center software with predictive dialing. The Elastix functionality is based on open source projects including Asterisk, HylaFAX, Openfire and Postfix. Those packages offer the PBX, fax, instant messaging and email functions, respectively.

Well organized interface makes for very straight forward and easy configuration. Very accessible environment that I found particularly useful for other techs with fewer phone system management skills to get into and make changes, etc...

I've been using Elastix for about 2 years now, on more than one site, for companies from small to medium in scale. It works great. I've only even come close to pulling my hair out installing G729 codecs, and that was due to version incompatibility with asterisk.